Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
Yeah, the SLVR is very similar to the FONE, but it isn't available at Verizon, which is most of my family's carrier of choice. As for a Sept. 3 launch date, that would be perfect because my wife's Every2 is available in Sept., so we can use it to snag it for her grandparents. However, what are the odds a U.S. release would occur on the Sunday of Labor Day weekend?